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seen Aug 23 '12 at 14:32

Aug
23
accepted Photons and uncertainty principle
Aug
22
comment Photons and uncertainty principle
I perfectly know that momentum along x does commute with position along y and z, indeed in the expansion of my question I have already mentioned explicitly position in the direction of momentum. The perfect single-photon gun exists only in my head, as many devices in many thought experiments that can (and must) have an explanation.
Aug
22
awarded  Editor
Aug
22
revised Photons and uncertainty principle
better explained the question
Aug
22
comment Photons and uncertainty principle
But one may say that momentum is measured when you shoot the photon, since the ideally perfect gun allows you to impose energy and direction, so if you don't change this settings the measure is always the same with 0 standard deviation.
Aug
21
asked Photons and uncertainty principle
Jul
17
awarded  Scholar
Jul
17
accepted Is 4-volume element a scalar or a pseudoscalar in special relativity?
Jul
16
awarded  Student
Jul
16
asked Is 4-volume element a scalar or a pseudoscalar in special relativity?